• DO NOT bundle a communication line with a protective earth line or a power line.
Moreover, keep away a communication line from a noise source as much as possible.
• To prevent radio frequency noise, place a ferrite core on both ends of the communication cable.
Electromagnetic interference caused by radiofrequency noise (150 kHz to 1 GHz) affects
communication. In that case, attaching some ring ferrites to the cables can reduce
communication failure.
Figure 36 - Example of ring ferrite core installation
• Decide the arrangement of the cables and secure the cables.
It may be difficult to take a countermeasure of communication failure without securing the cables
because the condition that the communication failure occurs cannot recreate.
• Avoid installing a power line and a communication line in the same metallic duct.
When unavoidable, separate a line with a metallic separator and connect the duct containing a
metallic separator to GND. Or install a communication line into conductive pipes.
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